Motor-car brake



D. G. MACPHERSON.

MOTOR CAR BRAKE.

APPLICATION FILED JAN, 7.1921.

Patented Aug. 22, 1922.

PATENT @FFHQQ unit-so snares rename a. naornmson, or roars an LA' PRAIRIE, MANITOBA, oAnAna.

n o'ron-cm u BRAKE.

asses.

Specification of Letters Patent. Patented Aug. 22, 1922- Application filed January 7, 1e21.- Serial No. 435,696.

To all whom it may concern:

Be it .known that I, DoUonAs G. MAorHnR- soN, a subject of the King of Great Britain, and resident of the city of Portage la Prairie, Province of Manitoba, in the Dominion of Canada, have invented certain new and useful Improvements in Motor- Car Brakes,-as described in the followlng' specification and illustrated in theaccompanying drawings.

The principal objects of thls invention are, to facilitate the inspection, ad ustment and repair of the braking "elements, thereby enhancing the safety conditions and todeshowing the application of this invention.

- Figure 2 is a plan view.

Figure 3 is an enlarged sectlonal view through the. hub structure of the wheel showing the application of my inventlon. In the ordinary construction ofbrakes on motor vehicles the braking mechanism is arranged in a very restrictedspace between the wheel and the spring and it is very difficult of access and fre uently re-' quires the removal of the whee to make adjustments;

According to the present invention the brake drum 1 is arranged on the outer side of the wheel and the wheel hub 2- is proiected to carry the anti-friction bearing 3. Upon this bearing is mounted a drum 4 which is provided with a flanged 'rim 5 extending within the drumfl'and carries 'suitable brake shoes of theexpanding type which are: adaptedto engage the inner peripheral surface of the drum flange 1 The drum 4 is held from rotation by a-radius bar 6 which is pivotally secured to thecar frame 7 at a point about mid-way of. its length, said bar being bedded in atransverse groove 8 in the outer sideiof the'drum 4. I v

The drum 4 is held in place 'by.the'lock"- ring 9. threaded on the outerend of the hub engaging the innerbearing ring- 3 drum secured to the'outer side oft e wheel.

and upon the removal of this member the shoe drum 4 maybe lifted 'out.

The radius bar is readily detachable without disturbing the brake shoe drum; itbeing held in the retaining groove 8 by a "suitable locking bolt 10.

The brake shoes are here shown operated by a squared member 11 journalled between the flanges of the shoe drum and having a squared stem 12 projecting-through the face.

The radius bar carries a rotatable socket member 13 which fits over the squared stem of the brake operating member'll and this is operated by the brake arm 14 secured on the outer side to which the operating rod or cable 15 is connected.-

The construction described is extremely simple, the brakin member is centrally supported on the w eel hub and held from rotation by the radius bar which also forms the torque anchor. I

When it is desired to remove .the tire, the torque bar may be released and swung out of the way and when it'is desired to adjust the brake or renew the linings it is merely necessary to remove the retaining ring and withdraw the shoe drum.

The two drums enclose the shoes within a dust proof casing which will greatly enhance their braking value and as the whole brake mechanismis on'the outer side of the wheel it will be free from oil and grease and may be readily kept clean,

What I claim as my invention is:

,1. A motor car brake, comprisi g, a brake drum secured to the outer side or" the wheel, a brake supporting member rotatably mounted on the wheel, and means for holding said brake supporting member from rotation.

2. A motor car brake, comprising, a brake drum secured to the outer side of the wheel a brake supporting member rotatably mounted on the, wheel, and a-rod secured to said brake supporting member and ally connected to the frame;

3. A motor car brake, comprising, a brake drum secured to the outer side of the wheel, an anti-friction bearing arranged on the for anchoring isaid. shoe drum from rotation, brake shoes carried'by said shoe drum, and 'means for operating said-shoes.

4. A motor car brake,;eomprisin a brake pivot- 105 outer end of :the wheel hub, a shoe drum rotatably mounted on said bearing, means a brake shoe drum rotatably mounted aX- a brake shoe drum rotatably. mounted ax ially of said, brake drum, havin av flange ially of said brake drum, means for deprojecting inwardly within tie brake tachably securing said brake shoe drum in drum, brake shoes mounted on said shoe place, means for anchoring said brake shoe 5 drum flange, anchor means for holding said drum from rotation, brake shoes supported 15 shoe drum from rotation, and means caron said brake shoe drum and engaging the ried by said anchor means for operating brake drum, and means carried by said said brake shoes. anchor means for operating said brake 5. A motor car brake, comprising, a lorake shoes. 10 drum secured to the outer side of the wheel, DOUGLAS G, MACPHERSON. 

